Automatic raker

ABSTRACT

A rotatable brush and heater pivotally mounted beneath a frame for movement over the ground.

[451 July 11, 1972 United States Patent Neal mm Jm m 8 H 9 1 AU K RAKER1,921,688 3/1933 McLaughlin............. [72] Inventor: John M. Neal,512 Yolo Avenue. Oroville, lzngos lngersollwm" nt 959 5 l.868,\70 7/1932453,953 [22] Filed: Jan. 18, 1971 Primary ExaminerJacob L. NackenotfAttorney-Alexander B. Blair [2]] App]. No.:

[ ABSTRACT A rotatable brush and heater pivotally mounted beneath aframe for movement ever the groundv .94/39, 15/159 A. 94/44 .EOlc 23/0015/159 A; 94/44, 45. 39

s21 (58] FieldofSearch.....4 4..................

[56] References Cited UNITED STATES PATENTS 3,459J09 8/1969Ingleright..............

3 Chins, 5 Drawing figures sum 2 or 2 IN VEN TOR. do/nv M. lVfALllg'oe/v EY.

AUTOMATIC RAKER This invention relates to a device for cleaning materialofl an old slab while evenly joining it with a new slab with regard topavement on the ground.

A primary object of this invention is to even up paved portions with oldportions of a road in a single operation so that the road is immediatelyprepared for traffic thereover.

Another object of this invention is the provision of means so that theapparatus is self-cleaning.

The above and other objects of this invention will become apparent tothose skilled in the art after a consideration of the detaileddescription of a preferred embodiment of thisinvention taken togetherwith the accompanying drawing wherein:

FIG. 1 is a plan view of the apparatus;

F IG. 2 is a side elevational view thereof;

FIG. 3 is a sectional view taken on line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken on line 4-4 of FIG. 2; and

FIG. 5 is a plan view of the entire apparatus illustrated in use on aroad.

Referring in detail to the drawing, there is shown in FIG. 5 a vehiclewith a rear container 22 which holds material and spreads it over theroadway 24 as vehicle 20 moves therealong. Slidably attached to the rearof the container 22 is a frame 25 having a brush and blade unit 26pivotally mounted therebelow and a motor 28 for rotating the brush ofunit 26.

As best seen in FIG. 3, frame 25 is comprised of a plate 30 having apipe 32 along each longitudinal end thereof for support. Motor 28 isconnected to a wire brush 34 for rotation thereof via a flexible driveshaft 36. Encasing a portion of the circumferential surface of wirebrush 34 is an arcuate housing 38 comprising an inner blade 40 and anouter removable wall 42 enclosing heating elements 44 attached to wall42. As shown in greater detail in H0. 4, a housing 46 comprisingstraight blade 48 and removable wall 50 to which is attached a heatingelement 52 enclosed within housing 46 extends outward longitudinallyfrom one end of wire brush 34 and housing 38.

Heating elements 44 and 52 prevent material from sticking to the bladesand also heats up wire brush 34 which makes physical contact at theextremity thereof with inner blade 40.

As shown in FIGS. 1 and 2, a rod 60 extends upward from housing 38through an arcuate slot 62 within plate 30. Rod 60 is slidably movedwithin slot 62 as housing 42 pivots about the longitudinal axis of ashaft 64 connected between housing 38 and the bottom surface of plate30. Plate 30 has a pair of shafts 66 extending upward from one endthereof adjacent container 22 slidably mounted within a pair of sleeves68 secured to the rear of container 22, each shaft 66 having a head 70against which one end of a spring 72 is engaged, the other end of spring72 being pressed against the upper end of sleeve 68 thereby acting as ashock absorber while holding plate 30 to the proper height for theraking operation. The dotted line in HG. l is representative of thejoint between the new paved layer 24 and the old paved layer 27 at whichpoint blade 40 and brush 34 even out the abutting layers while blade 48cleans any unwanted material from the old pavement.

While a preferred embodiment has been illustrated and described, it willbe apparent to those skilled in the art that many changes andmodifications may be resorted to without departing from the spirit andscope of the invention.

lclaim:

I. An automatic raker attachment for a paving machine comprising agenerally horizontal plate, means for detachably securing said plate tothe rear of said paving machine in rearward extending relation, a rotarybrush on a horizontal axis secured to and underlying said plate forpivotal movement about a vertical axis for angular adjustment, and aheated hood immediately adjacent the rear side of said rotary brush andmovable therewith.

2. A device as claimed in claim 1 including a power drive means for saidbrush mounted on said plate.

3. A device as claimed in claim 2 wherein said power drive means isconnected to said brush by a flexible drive cable.

1. An automatic raker attachment for a paving machine comprising agenerally horizontal plate, means for detachably securing said plate tothe rear of said paving machine in rearward extending relation, a rotarybrush on a horizontal axis secured to and underlying said plate forpivotal movement about a vertical axis for angular adjustment, and aheated hood immediately adjacent the rear side of said rotary brush andmovable therewith.
 2. A device as claimed in claim 1 including a powerdrive means for said brush mounted on said plate.
 3. A device as claimedin claim 2 wherein said power drive means is connected to said brush bya flexible drive cable.